Bearing seal



Cd. 13, 194-2. w G. BURT, JR 1 2,298,463

- 7 BEARING SEAL INVENTOR WILL/AM a aez we ATTORNEYS. I

' Patcnted OchlIi, 1942 I 2,298,463

I UNITED. STATES PATENT OFFI E.

BEARING SEAL William Griswold Burt, In, New Britain, Conn, assignor to The Fafnir Bearing Company, New Britain, Conn., a corporation of Connecticut ApplicationJanuary 6, i940, Serial No. 312,637 1 Claim. (01. 286-5) My invention relates to a bearing and more is'stressed by being stretched radially ontothe particularlytoaseal fora bearing. 7 seal surface ll, so as to be in relatively tight It is an object of the invention to provide an sealing engagement with the seat surface I0. improved, simple form of seal for an anti-fric- The edge of the seal ring II, where it contacts tion bearing.

It is another object to provide a seal for a selfstantial area, as indicated at [2. Such area may alining bearing which will be equally effective be a preformed one or may be provided by dein substantially all positions of self-alinement formation of the edge of the seal ring I I, where of the bearing. it forcibly contacts the seal surface l0.

Anotherobject is to provide a bearing with a 10 The seal line H is held in its stressed condi seal'which by its inherent resiliency will be-contion and in sealing contact with the inner ring stantly urged into contact with relatively rotatby suitable means, such as a seal plate l3, which able sealing surfaces of the opposed rings. may be seated against the bottom of a counter- Other objects and various features of novelty bore, as indicated at I 4, so as to be in tight sealand invention ,will be hereinafter pointed out or 5 ing e a e With t O ter ring and the outwill become apparent to those skilled in the art. er edge of the seal plate, I 3 may be swedged 01' In the drawing which shows, for illustrative otherwise secured in an undercut groove I5 in purposes only, preferred forms of the inventionthe outerehearing ring, as will be understood.

1 is an edge view in quarter section of a h Seal r ng I as stated, being pr y of bearing showing one form of the invention; and resilient material and stressed by being forced Fig. 2 is a fragmentary, sectional view of the up onto a larger diamete O t e S Surface, bearing shown in Fig. 1 and illustratin a slighttends to wedge itself into the angular space bely modified form ofseal. tween the seal plate l3 and the seal surface l0 My improved seal, While not exclusively ada tso as to e in relatively tight sealing engagement ed for use on self-alining bearings, is neverthel of particular utility i connection with'such It. In all positions of self-alinement of the bearbearings and ha been illustrated in connection in: the seal ring ll may slide over the spherical cludes an inner bearing ring 5 and an outer remain in Sealing act t th Se P ate bearing ring 6, with interposed anti-friction bear- 50 as to provide a tight seal againstloss of lubri ing m mber u h as b l 7, T inner ring may cant and ingress of foreign matter and this rebe provided with one or more raceway grooves geldless irregularities n the formation of the 8 and the outer ring is provided with a spherical s e nd even if the surface I0 is not a seat 9, the center of the sphere being in the ri tlyspherieal surface. longitudinal axis of the bearing. Thus, as will y improved seal is particularly adaptedfor be understood, the bearing is capable of selfuse as airplane bearings in which cleaning fluid allnement. is often quite forcibly applied to the airplane and One of the rings is provided with :a generally consequently to the outside of the bearings. The tapering, preferably spherical sealing seat and a See-l P a e g pre erab y of sheet metal -or stress the seal ring in a generally radial direcmechanical mm to e Seal r ng. The pro rtion and consequently, due to the resiliency of t s of the parts are preferably such that the the seal ring, to urge the latter in a, generally seal plate l3 serves to limit the extent of selfaxial direction. The other of the rings is proinement 0f the two rings by contacting at its vided with means to abut the seal ring and thus inner ed e wi an ent ortion f the inhold the latter in its stressed condition in sealn at he imit of self-alinement.

In the form illustrated the inner ring is proand functlonin substantially the same manner as vided with a generally tapering seal surface It, heretofore described. The seal ring ll. howwhich is preferably of spherical form concentric ever, is of slightly different form and is preferpreferably of resilient material, such as synthetic that the seal rmg H has a preformed surface rubber of the type known as "Neoprene," is ll of substantial extent to fit upon the adjacent formed, as an annular continuous seal ring and spherical seal surface III of the inner ring.

While the invention has been described in siderable detail an to be understood d preferred forms shown, that various changes may be said seal means including a seal disk carried by said outer ring and extending across the space between said rings and into proximity to said generally spherical seal seat and forming with made within the scope of the invention as defined in the appended claim.

r a bearing including a pair of bin the other and held tionship about a point Seal means to concentric rings one ,wit

in axially self-aligning rela the latter a generally radially inwardly directed generally V-shaped groove, and an annular seal ring 0! yielding resilient rubber-like material stretched over said generally spherical seal seat and contractible by its 'own resiliency into sealin: contact with both said seal disk and said 7 generally spherical seat.

rings, the inner of said rings of generally spherical form 1 generation substantially on is of both said rings,

on the axis of 'both having a seal seat having its center 0 the point aforesaid on the ax WILLIAM- GRISWOLD BURT, JR. 

